Patent US3433144A successfully refreshed from Google Patents.
US3433144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperture trim means for a photoflash exposure control system
Assignee: Polaroid Corp
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Filing: 1966-09-29
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Granted: 1969-03-18
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Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 Andrew S Ivester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:49
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/48; G03B17/50; G03B17/52; G03B7/00; G03B7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A PHOTOGRAPHIC CAMERA INCLUDING AN EXPOSURE APERTURE ON AN OPTICAL AXIS FOR EXPOSING PHOTOSENSITIVE MATERIAL, THE COMBINATION COMPRISING: VARIABLE DIAPHRAGM MEANS ON SAID OPTICAL AXIS FOR DEFINING A RANGE OF EFFECTIVE EXPOSURE APERTURES; CONTROL MEANS COUPLED TO SAID DIAPHRAGM MEANS FOR EFFECTING A PROGRESSIVE VARIATION IN THE EFFECTIVE EXPOSURE APERTURE DEFINED BY SAID DIAPHRAGM MEANS; EXPOSURE MEANS INCLUDING FLASH MEANS FOR EFFECTING A FLASH-ILLUMINATED EXPOSURE THROUGH SAID EXPOSURE APERTURE OF PHOTOSENSITIVE MATERIAL ON SAID OPTICAL AXIS; ADJUSTABLE MEANS POSITIONABLE IN ACCORDANCE WITH THE RANGE OF THE SELECTED SUBJECT TO BE PHOTOGRAPHED; ACTUATING MEANS RESPONSIVE TO SAID CONTROL MEANS AND TO SAID ADJUSTABLE MEANS FOR EFFECTING ACTUATION OF SAID EXPOSURE MEANS AT VARIOUS SETTINGS OF SAID DIAPHRAGM MEANS DEPENDENT UPON THE SETTING OF SAID ADJUSTABLE MEANS; AND APERTURE TRIM MEANS ACTING UPON SAID ACTUATING MEANS FOR EFFECTING FINE ADJUSTMENTS IN THE EXPOSURE VALUE AT WHICH SAID EXPOSURE MEANS IS ACTUATED.
Claim 2
Dependent Claim
150 words
IN A PHOTOGRAPHIC CAMERA INCLUDING AN EXPOSURE APERTURE ON AN OPTICAL AXIS FOR EXPOSING PHOTOSENSITIVE MATERIAL, THE COMBINATION COMPRISING: VARIABLE DIAPHRAGM MEANS ON SAID OPTICAL AXIS FOR DEFINING A RANGE OF EFFECTIVE EXPOSURE APERTURES; CONTROL MEANS COUPLED TO SAID DIAPHRAGM MEANS FOR EFFECTING A PROGRESSIVE VARIATION IN THE EFFECTIVE EXPOSURE APERTURE DEFINED BY SAID DIAPHRAGM MEANS; EXPOSURE MEANS INCLUDING FLASH MEANS FOR EFFECTING A FLASH-ILLUMINATED EXPOSURE THROUGH SAID EXPOSURE APERTURE OF PHOTOSENSITIVE MATERIAL ON SAID OPTICAL AXIS; ADJUSTABLE MEANS POSITIONABLE IN ACCORDANCE WITH THE RANGE OF THE SELECTED SUBJECT TO BE PHOTOGRAPHED; ACTUATING MEANS RESPONSIVE TO SAID CONTROL MEANS AND TO SAID ADJUSTABLE MEANS FOR EFFECTING ACTUATION OF SAID EXPOSURE MEANS AT VARIOUS SETTINGS OF SAID DIAPHRAGM MEANS DEPENDENT UPON THE SETTING OF SAID ADJUSTABLE MEANS; AND APERTURE TRIM MEANS ACTING UPON SAID ACTUATING MEANS FOR EFFECTING FINE ADJUSTMENTS IN THE EXPOSURE VALUE AT WHICH SAID EXPOSURE MEANS IS ACTUATED.
References Cited (Backward Citations)
US3205802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |